PMID- 37539185 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230805 IS - 2405-8440 (Print) IS - 2405-8440 (Electronic) IS - 2405-8440 (Linking) VI - 9 IP - 7 DP - 2023 Jul TI - Circular RNA circSLC7A11 contributes to progression and stemness of laryngeal squamous cell carcinoma via sponging miR-877-5p from LASP1. PG - e18290 LID - 10.1016/j.heliyon.2023.e18290 [doi] LID - e18290 AB - BACKGROUND: Laryngeal squamous cell carcinoma (LSCC) belongs to tumors of head and neck. Circular RNA circSLC7A11 functions as oncogenes in various tumors. However, the role of circSLC7A11 in LSCC remains largely unknown. Here, we aimed to clarify the circSLC7A11 function in LSCC. METHODS: Relevance between circSLC7A11 expressions and LSCC clinicopathological was checked using chi-square. Relevance between circSLC7A11 expressions and LSCC patients' survival time was validated using Kaplan-Meier analysis. CircSLC7A11 expressions in LSCC tissues and cells were determined using quantitative real-time PCR. CircSLC7A11 functions in LSCC were examined by Cell Counting Kit-8, EdU analysis, Western blot, flow cytometry, sphere formation assay, and Transwell analysis. Meanwhile, circSLC7A11 mechanism in LSCC was determined using dual-luciferase reporter analysis, RNA pull-down, RNA Immunoprecipitation. RESULTS: CircSLC7A11 was highly expressed in LSCC, and high circSLC7A11 expressions were interrelated to the TNM stage. Also, LSCC patients with high circSLC7A11 owned shorter overall survival. Functional studies revealed that circSLC7A11 knockdown reduced LSCC cell proliferation, migration, invasion, stemness characteristics, and enhanced cell apoptosis. Mechanistic study data corroborated that circSLC7A11 targeted miR-877-5p, miR-877-5p targeted LASP1. LASP1 was negatively interrelated to miR-877-5p and was positively interrelated to circSLC7A11 in LSCC tissues. Also, circSLC7A11 knockdown reduced the LASP1 levels, and miR-877-5p inhibitor co-transfection reversed this reduction. Rescue assays further demonstrated that circSLC7A11 accelerated LSCC through miR-877-5p/LASP1. CONCLUSION: CircSLC7A11 exerted oncogenic functions in LSCC by miR-877-5p/LASP1, hinting that circSLC7A11 was a novel biomarker for LSCC. CI - (c) 2023 The Authors. FAU - Yu, Wenjie AU - Yu W AD - Department of Otolaryngology Head and Neck Surgery, First Hospital of Shanxi Medical University, China. FAU - He, Xiaoling AU - He X AD - Department of Otolaryngology Head and Neck Surgery, First Hospital of Shanxi Medical University, China. FAU - Zhang, Chunming AU - Zhang C AD - Department of Otolaryngology Head and Neck Surgery, First Hospital of Shanxi Medical University, China. FAU - Huang, Fuhui AU - Huang F AD - Department of Otolaryngology Head and Neck Surgery, First Hospital of Shanxi Medical University, China. LA - eng PT - Journal Article DEP - 20230714 PL - England TA - Heliyon JT - Heliyon JID - 101672560 PMC - PMC10393633 OTO - NOTNLM OT - CircSLC7A11 OT - LASP1 OT - LSCC OT - miR-877-5p COIS- The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2023/08/04 06:43 MHDA- 2023/08/04 06:44 PMCR- 2023/07/14 CRDT- 2023/08/04 04:11 PHST- 2023/01/18 00:00 [received] PHST- 2023/07/10 00:00 [revised] PHST- 2023/07/13 00:00 [accepted] PHST- 2023/08/04 06:44 [medline] PHST- 2023/08/04 06:43 [pubmed] PHST- 2023/08/04 04:11 [entrez] PHST- 2023/07/14 00:00 [pmc-release] AID - S2405-8440(23)05498-1 [pii] AID - e18290 [pii] AID - 10.1016/j.heliyon.2023.e18290 [doi] PST - epublish SO - Heliyon. 2023 Jul 14;9(7):e18290. doi: 10.1016/j.heliyon.2023.e18290. eCollection 2023 Jul.